Tourists Explore Double Arch, Arches National Park, Moab Utah
Double Arch is one of the most impressive natural rock formations in Arches National park.
| Credit: Greg Jaggears/Getty Images

National parks that typically charge entrance fees will be offering free admission this weekend to mark the start of National Park Week.

On Saturday, April 21, visitors will be able to visit popular parks like Grand Canyon , Joshua Tree, Yosemite, and Death Valley free of charge. Depending on the park, visitors can save up to $30.

In addition to a free admission day, National Park Week also offers a series of special events and free guided tours. Activities range from guided hikes at popular stops like Zabriskie Point at Death Valley to stargazing in Joshua Tree. This year’s theme of “Park Stars” celebrates the dark skies and natural gems that travelers can admire at U.S. national parks, as well as the NPS employees that keep the parks welcoming to visitors.

Earth Day is April 22, and there will be festivals at parks like Yosemite with live music, ranger meet and greets, photo walks, and Shakespeare performances.

There are two more days in 2018 when there will be free admission at the parks: National Public Lands Day, on September 22, and Veterans Day, on November 11.

Budget conscious travelers will want to take note of the free days, since the National Park Service will be increasing fees to 117 popular parks like Zion, Acadia, and the Grand Canyon starting June 1, 2018.